Katie's been abducted by brain-eating aliens (or, as she puts it, "I have a cold, it's fine guys seriously") so here's a classic episode she thought you'd enjoy (unless it's just the alien brain parasites talking): 

Today we’re talking about ALIENS! Right here on earth. Does that sound paradoxical? Well, maybe you should think about whether we were the aliens all along?? Discover this and more as we answer the age-old question, do animals really need to breathe? With special guest Joelle Monique.